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Oxford University Press, The American Journal of Clinical Nutrition, 2(85), p. 405-410, 2007

DOI: 10.1093/ajcn/85.2.405

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Effects of birth cohort and age on body composition in a sample of community-based elderly

Journal article published in 2007 by Jingzhong Z. Ding, Stephen B. Kritchevsky, Anne B. Newman ORCID, Dennis R. Taaffe, Barbara J. Nicklas, Marjolein Visser ORCID, Jung Sun Lee, S. L. Jung, Michael Nevitt, Frances A. Tylavsky, Susan M. Rubin, Marco Pahor, Tamara B. Harris, A. B. C. Study Hlth, Health Abc Study
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

Background: The effect of the recent obesity epidemic on body composition remains unknown. Furthermore, age-related changes in body composition are still unclear. Objective: The objective was to simultaneously examine the effects of birth cohort and age on body composition. Design: A total of 1786 well-functioning, community-based whites and blacks (52% women and 35% blacks) aged 70-79 y from the Health, Aging, and Body Composition Study underwent dual-energy X-ray absorptiometry annually from 1997 to 2003. Results: At baseline, mean SD percentage body fat, fat mass, and lean mass (bone-free) were 28 +/- 5%, 24 +/- 7 kg, and 56 +/- 7 kg, respectively, for men and 39 +/- 6%, 28 +/- 9 kg, and 40 +/- 6 kg for women. Mixed models were used to assess the effects of cohort and age-related changes on body composition. Later cohorts in men had a greater percentage body fat(0.32% per birth year, P